Year	current US$
1971	5400000.095
1972	3279988.05
1973	7940000.057
1974	10399991.04
1975	39380001.07
1976	44840000.15
1977	44099998.47
1978	47279998.78
1979	50680000.31
1980	54340000.15
1981	61840000.15
1982	47340000.15
1983	43479999.54
1984	45000000
1985	47240001.68
1986	53400001.53
1987	56919998.17
1988	60680000.31
1989	63459999.08
2000	11000000
2001	19340000
2002	22000000
2003	31350000
2004	38520000
2005	59686000
2006	75515000
2007	96408000
2008	117080211.677778
2009	134824003.777778
2010	166978561.660663
2011	240237393.533333
2012	231924077.155555
2013	247694320.733333
2014	248597074.395626
2015	247297661.250661
2016	266340122.310087
2017	297710340.430135
2018	309403439.143222
2019	284975298.612722
2020	549483207.172
2021	678498745.922534
2022	725386292.381882